This upcoming port of the gem Gurumin: A Monsterous Adventure on the Nintendo 3DS got new teaser video in addition to the announcement that it will digital only on the 3DS E-Shop.

You’re going to have to embrace the digital revolution if you want to play Gurumin 3D: A Monstrous Adventure on the Nintendo 3DS. Publisher Mastiff has confirmed on its Ask.fm page that it will be “targeting” the digital release for both the Nintendo 3DS and New Nintendo 3DS eShops.
We don’t have an exact date, but we are still targeting late summer for the release of Gurumin 3D: A Monstrous Adventure on the Nintendo 3DS eShop.

We will be releasing a review of the PSP version of the game when the this launches on the 3DS in the future and hope you look forward to it.
Sources: Techno Buffalo & Nintendo Wire